TC7117 TelCom, TC7117 Datasheet - Page 12

• Manufacturer Part Number: TC7117
• Description: 3-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTERS WITH HOLD
• Manufacturer: TelCom

TC7116
TC7116A
TC7117
TC7117A
TYPICAL APPLICATIONS
3-214
Figure 12. TC7117/TC7117A Internal Reference (200 mV Full Scale,
Figure 11. TC7116/TC7116A Using the Internal Reference
TC7117A
TC7117
TC7116A
TC7116
3 RPS, V
(200 mV Full Scale, 3 Readings Per Second (RPS)
40
39
38
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36
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32
31
30
29
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27
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25
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23
22
21
40
39
38
37
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35
34
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31
30
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22
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0.47 µF
–
IN
0.22 µF
TO DISPLAY
Tied to GND for Single-Ended Inputs.)
0.47 µF
0.22 µF
TO DISPLAY
0.1 pF
0.1 pF
100 k
100 pF
TO BACKPLANE
100 k
100 pF
SET V REF = 100 mV
1 k
SET V REF = 100 mV
47 k
1 k
47 k
0.01 µF
0.01 µF
1 M
22 k
1 M
22 k
+
–
+
–
IN
9V
+
–
+5V
–5V
IN
Figure 13. Circuit for Developing Underrange and Overrange
TC7117A
TC7117
Figure 14. TC7117/TC7117A With a 1.2V External Band-Gap
O/R
U/R
CD4023
OR 74C10
3-1/2 DIGIT ANALOG-TO-DIGITAL
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31
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Signals from TC7116/TC7116A Outputs
Reference (V
0.47 µF
0.22 µF
CONVERTERS WITH HOLD
TO DISPLAY
0.1 pF
LOGIC
TELCOM SEMICONDUCTOR, INC.
V CC
100 k
TO
100 pF
V
–
IN
+
CD4077
Tied to Common)
1 k
47 k
0.01 µF
SET V REF = 100 mV
1.2V
10 k
O/R = OVERRANGE
U/R = UNDERRANGE
20
TC7116A
TC7116
1 M
10 k
TC9491CZM
40
35
26
21
+
–
LOGIC
GND
IN
TO
V
V
V
–
+
–